Hi,
I like the Sharpe Finex gun also. I use the 1.4 tip as it is the recomeded nozzel for the Concept Clear of Omni products. I used to use a .8 and had problems because the mill thickness of the coating was too thin. After referring to the Manufacture's spec sheet, I get a much better spray job with the 1.4 and it sands and buffs better.
I might waste some material but the job is clearly better.
I am also a fan of using a compressor.
Compressor Set Up Tip:
To treat your air supply better it is wise to install a larger air receiver downstream of you compressor's primary tank. I use a 60 gallon tank and due to the larger volume, the air is cooler and has less moisture content. When I spray cues, the compressor never turns on as I have more volume than needed. When air is compressed there is a point where the temperature and the dew point meets and the air is supersaturated with moisture, hence the moisture in the tanks that needs to be purged. If you install an auto condensate drain on both your tanks and use a desiccant dryer filter downstream of the 2nd tank before your particulate filter, the quality of your air for spraying will be stellar and consistent. I have a air isolation valve on my 2nd tank ( dedicated to coating only - not shop air ) and the air in that tank is always ambient shop temperature. After spraying I open the valve and let the tank fill up and then I close the valve. The next time I spray, the air in that 2nd tank is cool and relatively dry before it hits the drying filter. The filter does not need to absorb a huge amount of excess moisture like you see when coming off a compressor with one tank which will be hot and moist.
Rick G